Galaxy Breeding Manual: the Chief Farmer in the End of the World

The last breath of fresh oxygen in the universe is actually myself? Cheng Shuiyao, a good-for-nothing in the apocalypse, originally wanted to survive by growing potatoes, but because his blood can stimulate flowers and grass, he was regarded as a "humanoid self-propelled power bank" by Pu Heyu, a veteran cadre (non-human) with the ceiling of combat power. Forced to go on an interstellar health-preserving journey. Male protagonist: "This thing is unzipped and belongs to me." Female protagonist: "Help! Is this apocalyptic script a silly love story?!"